Lesson 5 — Finishing 1.2 + Start friction

• Natuurkunde / Scheikunde
• Middelbare school
• havo, vwo
• Leerjaar 1

This lesson

• Recap
  
• Discussing the homework
• Working independently

Learning goals

•  Describe the effects of balanced and unbalanced forces on the motion of objects
• Apply what we learned in §1.2 in Exercise E
• Start §1.3 Friction

Recap?

Balanced forces?

Unbalanced forces?

Resultant force?

• Forces in the same direction add up.
  

• Forces in opposite direction cancel out.

What do these words mean?

Stationary?

Constant Velocity?

Acceleration?

What do these words mean?

Stationary?  - Standing still

Constant Velocity?

Acceleration?

What do these words mean?

Stationary?  - Standing still

Constant Velocity? - Steady speed

Acceleration?

What do these words mean?

Stationary?  - Standing still

Constant Velocity? - Steady speed

Acceleration? - speeding up (or slowing down)

	balanced forces	Unbalanced forces
stationary objects
Moving objects

	balanced forces	Unbalanced forces
stationary objects	stays stationary	starts moving
Moving objects	keeps the same speed	accelerates/ decelerates

Balanced forces

• Stationary object stay stationary.
  
• Moving object move at a constant velocity.

Unbalanced forces

• Stationary objects are forced into motion.
  
• Moving objects are forced to accelerate or decelerate.
  

Discussing 

the homework

Discussing 

the worksheet

1. Compare your answers with your neighbour.
2.  One of you gets an answer sheet, check your answers with the answers sheet.
3. Done —> Do workbook exercise E

Working independently

Do: Workbook 1.2 – Exercise E

Done?

Read: Textbook – 1.3 Friction

Do: Workbook exercises 1.3 + Textbook yellow block exercises

Learning goals

•  Describe the effects of balanced and unbalanced forces on the motion of objects
• Apply what we learned in §1.2 in Exercise E
• Start §1.3 Friction

Homework

• Workbook 1.2 exercise E

• Read 1.3 Friction
• Do yellow block exercises 1.3